Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

How do the wets burn? Fire behavior and intensity in wet grasslands in the Brazilian savanna

Texto completo
Autor(es):
Schmidt, Isabel B. ; Fidelis, Alessandra ; Miranda, Heloisa S. ; Ticktin, Tamara
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: BRAZILIAN JOURNAL OF BOTANY; v. 40, n. 1, p. 167-175, MAR 2017.
Citações Web of Science: 5
Resumo

Although wetlands are commonly managed with fire by local communities and managers in tropical savannas, little is known about fire behavior in these ecosystems. We measured fire intensity and temperature in 13 experimental early (June) and late (September) dry season fires in wet grasslands in the Brazilian savanna, the ``Cerrado''. We aimed to characterize ``Cerrado'' wet grasslands fire behavior and to understand how fire season (early vs. late dry season) and time since last fire affect fire behavior and intensity. We compared fire intensities in biennially burnt areas to areas unburned for 5 years. Experimental fires consumed 60-98 % of the fuel and were of low intensity (240-1083 kW m(-1)) compared to those in dry savanna grassland with similar fuel loads (0.4-1.3 kg m(-2)). Fires in areas with contrasting times since last fire (2 and 5 years) had similar intensities. Late dry season fires tended to be more intense than early dry season fires, but the difference was not significant. The low fire intensities are probably due to high soil water availability year around, a characteristic of wetlands. Maximum temperatures were low (149-442 degrees C, mostly at 50 cm in height) compared to fires in dry savanna ecosystems. Our results can directly contribute to plan and implementation of fire management programs in the ``Cerrado'', where it is mostly still not carried out. (AU)

Processo FAPESP: 08/10049-9 - Efeitos do fogo na dinâmica da vegetação campestre do cerrado no Parque Estadual do Jalapão: uma abordagem funcional
Beneficiário:Alessandra Tomaselli Fidelis
Linha de fomento: Bolsas no Brasil - Pós-Doutorado